Door lock



E. L. M EWEN June 15, 1948.

DOOR LOCK Filed Oct. 11, 1946 Patented June 15, 1948 UNITED STATESPATENT OFFICE DOOR LOCK Elmer L. McEwen, Seattle, Wash.

1, 1946, Serial N0. 702,656

Claims. (C1. 292-34) Application October 1 This invention appertains toa to sliding doors as well as to swinging doors. It is very simple inconstruction easy to manufacture at low cost, requiring minimum ofmachine work, and it is very strong as all parts are solid andsubstantial and cannot get out of order.

These and other objects and advantages will be readily understood fromthe subjoined description with the aid of the attached drawing in whichone embodiment of the invention is illustrated. V

Figure 1 is a side elevation of the main part of the lock;

Figure 2 an end view of Figure 1;

Figure 3 a top plan view of Figure 1;

Figure 4 a vertical section taken on line 4--4 of Figure 2;

Figure 5 a face view of a V-shaped latch plate for use with swingingdoors;

Figure 6 is a similar view of a ring shaped latch plate for slidingdoors;

Figure '7 is a fragmentary face view of a pair of sliding doors partlyopen with the ring latch plate of Figure 6 in position; and

Figure 8 a fragmentary face view of a pair of swinging doors with alatch plate of Figure 6 in closed position.

Like reference numerals denote the same details in the different views.

In the drawing, main portion of the lock; denoted in general by numeralI0, is fastened in the edge of one of a pair of doors or in the movingdoor if only one'is movable, while the matching latch portion |2 or I3is carried in the door frame, or in the stationary door in case only oneof them is movable.

This main lock portion H], as here shown, consists of a solid, metalblock ll, provided with a rectangular shallow pocket or depression l4 inthe middle of its top edge. The right and left top corners t5 are cutoff slantingly at 45 angle and similarly an inverted V-shaped cut withslanting surfaces H5 is provided right across the block H at its bottom;surfaces l5 and I6 being parallel, while the apex of the inverted V-cutis rounded as at IT.

From each slanting corner surface l5 and perpendicularly thereto, isprovided a cylindrical bore having a small diameter It at its lower end,opening thru the slanting surface l6, and a larger diameter l9 at itsupper half. In each of these bores is housed a plunger or latch bolt theaxes of which thus forming a 90 angle to each other. The main portion ofeach bolt 20 has a diameter to lit the small bore l8 and midway lockapplicable between its ends the bolt is provided with a collar 2|fitting in the larger bore I3 in the block II. In the upper end of thebore I9 is placed an abutment collar and between said collar 22 and thefixed collar 2| is inserted a coil spring 23. This abutment collar 22 isfixed in position in bore H! by a couple 'of split pins 24 extendingfrom one side to the other of the block I l. A narrow shank 25is formedat the upper end of the bolt 20 having at its extreme end a head 26.

At the left end of the block H as seen in Figures l, 3 and 4, is pivotedat 29 an L-shaped lever consisting of two substantially parallel arms 30spaced apart by a pair of sleeves 3|, thru which are inserted a pair ofbolts 32 drawn up tightly to form a rigid connection between said arms30. When at rest, the long shanks 33 extend along the top surface of theblock H to beyond the farther end of the recess or pocket M as seen infull lines in Figures 1 and 4. Similarly another lever with its longarms 33a pivoted at 29a extends along the top of the block and in asimilar manner reaches across the pocket [4.

When in position of rest, the heads 26 of the latch bolts 20 abut theslanting surfaces a at the bend of the levers pushed down by the springs23.

In the pocket I4 is lodged a cam member 34 which rotates with a shaft 35to which is keyed an operating handle 36. This shaft 35 extends acrossthe pocket l4 near an end thereof. The cam member 34 when in position ofrest, substantially fills the pocket or depression l4, Figures 1 and 4.

Upon swinging the handle 35 in one direction, the outer end of the cammember 34 will press against the lever arms 33 and 33a thereby movingthem into the dot and dash position seen in Figure 1. This movement ofthe lever arms 33 and 33a will cause the heads 26 of the latch bolts 20to be retracted to release the both from the latch plate l2. A fiatspring 31 is provided to hold the lever arms in position of rest. Thesesprings are secured by screws 38 at the right and left ends of the blockAs particularly shown in Figures 5 and 8 the latch plate |2 has aforwardly projecting wedge portion 4| extending beyond the door frame Fto which it is attached by screws 40. The outer surface of the wedge 4|is triangular and parallel to the bottom surface of the plate l2, whileits sides 42 are slanting downwardly towards the plate. The apex of thewedge 4| is immediately adjacent to an edge of the plate I2 having abroad base 44 at the opposite edge of the plate. It will thus be seenthat the latch plate I2 is them. In this manner the latch bolts 2!] willclose over the wedge base 44 and thus lock the door.

Referring now to Figures 6 and: 7 these figures illustrate a ring shapelatch block l3" which" is used for sliding doors. The main part of thelatch block l3 consists of of a sliding door. Upon the door the ring 55will enter edge ways between the 'points-or't'h'e latch bolt 20 andthereby forcin-gth-em'apart to rest in the rounded pocket portion llbetween the slanting surfaces [6, whereupon the tips-of the latch bolt29 will close in behind the ring 45 and -thus--'lock thedoor;

It--isto b'e understood thatthe-"invention" as hereinldis'c-losed maybev variedfrom the details described and shownwithout departure from thespirit of the subjoined' claims.-

I claim:

1i A-door latch-comprising a substantially solid blocln and alatch platecooperating therewith,- a= pair'oflatch bolts slidably mounted in saidblock with their axes at substantially right angles to each other in themiddle plane of thebloclz, meansforr holding the: bolt ends: inadjacent,closed position and-other means for withdrawing them into? openposition.-

2v Ad'oon loch-as: described in claim- 1,' wherein said closing meanscomprise springs urgin g the a ring 55 carried ona long shank 46 whichis secured in the edge face:

tips of said bolts together for engaging said latch plate, headsprovided at the outer ends of said bolts, a lever for each bolt mountedto oscillate on a pivot pin thru said block and a fiat spring securedadjacent said pivot pins and adapted to fold said levers together undersaid head.

3. A door look as described in claim 1, wherein said closing meanscomprise springs urging the tips of said bolts together for engagingsaid latch plate, heads provided at the outer ehds of said bolt's, alever foreach bolt mounted'to'oscillate on a pivot pin thru said blockand a fiat spring secured adjacent said pivot pins and adapted tofold-said levers together under said head; said cam being housed in apocket formed in said lock beneath said folding levers, so as to contacttherewith whereby upon operating said handle, said shaft will'swing thecam into upright position-toraise the adjacent portions of the foldinglevers, which in turn will withdraw the bolts by: contacting with theirheads-- 42' A door lock-- as described in claim 1,: said latch vplatebeing-- secured in a -frame for a slidingdoor; and consistingof a ringshaped portion adapted to be foncedin between the tips of the latchbolts to be pushed. beyondsaid tips in a recess formed behind the tipsof said-bolts;

5. A- door lockas describedin claim-1,-.said latch: plate being- Wedgeshaped for cooperating with-said-latch bolts on aswinging door andcomprising a raised V-shaped portion on the latchplate adapted toengagethe tips of' said bolts to force them apart thereby passing-them to belocked therebyon the-other: si-deoi the bolts.

ELMER L. MCEWEN:

